Patents by Inventor Walter Kohhirt

Walter Kohhirt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cathodic electrodeposition coatings, their production and their use
    Patent number: 6541120
    Abstract: Aqueous, lead-free cathodically depositable (CDL) coating compositions containing binders and, optionally, crosslinking agents, pigments, and/or additives conventionally employed in lacquers, as well as one or more sulfonic acid salts of the metals vanadium, manganese, iron, zinc, zirconium, silver, tin, lanthanum, cerium and/or bismuth and/or of organometallic compounds in a total amount of from 0.2 to 2 wt. %, calculated as metal and based on the resin solids.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: April 1, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Klausjörg Klein, Walter Kohhirt